96.63% is the change from 504 to 991
Calculation steps:
[( 991 - 504 ) ÷ 504] x 100 = 96.63%
Formula
Percentage change = [(991 - 504) / 504] x 100
Subtract the new number by the original number
991 - 504 = 487
487 ÷ 504 = 0.9662698412698413
0.9662698412698413 x 100 = 96.63%